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Note 3 - Fair Value Measurements
9 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
3.
 
Fair Value Measurements
 
Below is a summary of assets and liabilities measured at fair value (in thousands):
 
 
 
As of September 30, 2018
 
 
Quoted Prices
 
Significant
 
Significant
 
 
 
 
in Active
 
Observable
 
Unobservable
 
 
 
 
Markets
 
Inputs
 
Inputs
 
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets
 
 
 
 
 
 
 
 
Cash equivalents
 
$
13,510
 
 
$
-
 
 
$
-
 
 
$
13,510
 
Government securities
 
 
7,987
 
 
 
-
 
 
 
-
 
 
 
7,987
 
Total
 
$
21,497
 
 
$
-
 
 
$
-
 
 
$
21,497
 
 
 
 
As of December 31, 2017
 
 
Quoted Prices
 
Significant
 
Significant
 
 
 
 
in Active
 
Observable
 
Unobservable
 
 
 
 
Markets
 
Inputs
 
Inputs
 
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets
 
 
 
 
 
 
 
 
Cash equivalents
 
$
11,662
 
 
$
-
 
 
$
-
 
 
$
11,662
 
Government securities
 
 
20,971
 
 
 
-
 
 
 
-
 
 
 
20,971
 
Total
 
$
32,633
 
 
$
-
 
 
$
-
 
 
$
32,633
 
 
As of
September 30, 2018
and
December 31, 2017,
the Company’s cash equivalents consist principally of money market funds and government debt securities with original maturities of
90
days or less. Government securities consist principally of government debt securities and money market funds which are classified as available-for-sale.
 
Available-for-sale securities at
September 30, 2018
and
December 31, 2017
consist of the following (in thousands):
 
 
 
Amortized Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
September 30, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Government securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Due within 1 year)
 
$
7,989
 
 
$
-
 
 
$
(2
)
 
$
7,987
 
 
 
$
7,989
 
 
$
-
 
 
$
(2
)
 
$
7,987
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Government securities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Due within 1 year)
 
$
20,991
 
 
$
-
 
 
$
(20
)
 
$
20,971
 
 
 
$
20,991
 
 
$
-
 
 
$
(20
)
 
$
20,971